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Microchip Technology 1N5924BUR-1/TR
- Part No.:
- 1N5924BUR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AB, MELF (Glass)
- Datasheet:
-
1N5924BUR-1/TR.pdf
- Description:
- DIODE ZENER 9.1V 1.25W DO213AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,490
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Product details
Overview
1N5924BUR-1/TR from Microsemi is a 1.5 W surface-mount Zener diode in DO-213AB (MELF) glass package, rated for 9.1 V ±5% Zener voltage at 41.2 mA test current, with 4.0 Ω dynamic impedance, 0.5 mA knee current, and 7.0 mA maximum Zener current. It delivers stable voltage regulation in high-density power supply and reference circuits across industrial temperature range.
For engineers reviewing the 1N5924BUR-1/TR datasheet, 1N5924BUR-1/TR pinout, 1N5924BUR-1/TR application, or 1N5924BUR-1/TR equivalent, key selection criteria include its hermetic glass construction, metallurgically bonded contacts for low thermal resistance (RθJA = 120 °C/W), MIL-PRF-19500 screening capability, RoHS-compliant plating, and ESD immunity per MIL-STD-750 Method 1020.
Technical Context
This device operates as a precision voltage reference in reverse-biased breakdown mode, with specified Zener voltage (VZ = 9.1 V) measured at TEC = 30 °C after 90 s stabilization. Its low dynamic impedance (ZZT = 4.0 Ω) ensures minimal output voltage variation under load changes.
The DO-213AB MELF package enables high-reliability surface mounting with hermetic glass sealing, tungsten slugs for thermal conduction, and cathode-band polarity marking. It supports steady-state power dissipation of 1.5 W at TEC ≤ 115 °C and 1.25 W at TA = 25 °C on FR4 board.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 9.1 V ±5% at IZT = 41.2 mA - defines nominal regulation point with tight tolerance for stable reference generation |
| Dynamic Impedance (ZZT) | 4.0 Ω - ensures <10 mV output shift per 10 mA load change, critical for low-noise analog references |
| Knee Current (IZK) | 0.5 mA - minimum current to enter useful regulation region; enables low-power standby operation |
| Max Zener Current (IZM) | 164 mA - sets absolute upper limit for continuous DC operation without exceeding 1.5 W power rating |
| Junction Temp Range | –65 °C to +175 °C - supports extended industrial and aerospace environments without derating |
| Thermal Resistance (RθJA) | 120 °C/W on FR4 (1 oz Cu) - determines required PCB copper area for thermal management at full power |
| Forward Voltage (VF) | 1.2 V max @ 200 mA - confirms low-loss forward conduction for protection or clamping use cases |
Pinout & Package
DO-213AB (MELF) glass package: hermetically sealed cylindrical body with metallurgically bonded tungsten slugs; cathode indicated by single black band; lead-free matte tin plating over copper; weight ≈ 0.05 g; dimensions BD = 2.39–2.67 mm, BL = 4.80–5.21 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Current entry terminal in forward bias; ground reference in Zener regulation | Connected to system ground or lower-potential node when used as shunt regulator |
| Cathode (banded end) | Current exit terminal in forward bias; regulated output node in Zener mode | Provides stable 9.1 V output referenced to anode; must be held positive relative to anode for regulation |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass MELF construction | Eliminates moisture ingress and long-term parameter drift; qualified for high-reliability mil-aero applications |
| Metallurgically enhanced internal contacts | Reduces thermal resistance (RθJEC = 40 °C/W) and improves power handling stability under thermal cycling |
| MIL-PRF-19500 screening option | Enables qualification for defense and space programs requiring controlled manufacturing and lot traceability |
| ESD immunity (MIL-STD-750 Method 1020) | Withstands >8 kV HBM without parameter shift-critical for handling in automated SMT lines |
| RoHS-compliant plating | Matte tin finish meets JEDEC J-STD-020 reflow requirements and eliminates lead-based solder compatibility issues |
Applications
| Industrial Power Supply Regulation | Automotive Sensor Reference |
|---|---|
Use Scenario: Shunt regulation in isolated auxiliary supplies for PLC I/O modules operating from 12–24 V rails. IC Role / Device Role / Timing Role: Voltage reference and overvoltage clamp for LDO input stage. Use Value: Maintains 9.1 V ±5% accuracy across –40 °C to +105 °C with <4 Ω impedance, ensuring ADC reference stability. |
Use Scenario: Precision biasing of Hall-effect position sensors in engine control units exposed to under-hood temperatures. IC Role / Device Role / Timing Role: Stable excitation voltage source for ratiometric sensor outputs. Use Value: Hermetic glass package prevents parametric shift due to humidity and thermal stress, meeting AEC-Q200 stress requirements. |
| Aerospace Avionics Reference | Medical Diagnostic Equipment |
Use Scenario: Primary voltage reference in radiation-tolerant data acquisition front-ends for satellite telemetry systems. IC Role / Device Role / Timing Role: Radiation-hardened Zener element providing fault-tolerant 9.1 V rail for ADC drivers. Use Value: Inherent radiation hardness (per MicroNote 050) and MIL-PRF-19500 screening enable operation in total ionizing dose >100 krad(Si). |
Use Scenario: Calibration reference in portable ultrasound transducer bias supplies requiring long-term drift <0.1%/1000 hrs. IC Role / Device Role / Timing Role: Low-noise shunt regulator for high-gain analog front-end amplifiers. Use Value: 0.5 mA knee current and 4.0 Ω ZZT minimize noise contribution while enabling microamp-level standby regulation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5924B-TR | Same electrical specs but in DO-41 axial-leaded package; no MIL-PRF-19500 screening option; RθJA = 500 °C/W (free-air) | Preferred for through-hole prototyping or legacy board upgrades where SMT footprint is unavailable | Select when mechanical robustness and hand-soldering compatibility outweigh density and thermal performance needs |
| SMBG5924B-E3/5A | Same VZ, IZT, ZZT; SMB package; higher RθJA = 150 °C/W; RoHS-compliant; no MIL screening path | Used in consumer-grade power adapters where cost and assembly speed dominate reliability requirements | Choose for high-volume commercial production needing faster reflow throughput and lower component cost than MELF |
Compared with 1N5924BUR-1/TR, the DO-41 1N5924B-TR sacrifices thermal performance and screening for mechanical serviceability, while the SMBG5924B-E3/5A trades hermeticity and radiation tolerance for lower assembly cost and higher production yield in non-critical applications.
Availability
1N5924BUR-1/TR is available at Aetrix Electronics and suitable for industrial power supply regulation, automotive sensor reference, aerospace avionics reference, and medical diagnostic equipment requiring stable component supply with guaranteed long-term continuity.
Supply support for 1N5924BUR-1/TR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Microsemi Corporation (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability, radiation-hardened, and aerospace-grade components.
The 1N59xxBUR-1 series was designed for mission-critical voltage regulation in defense, space, and industrial systems where hermetic sealing, MIL-spec screening, and parametric stability under extreme conditions are mandatory.
FAQ
What is the Zener voltage tolerance and test condition for 1N5924BUR-1/TR?
The 1N5924BUR-1/TR has a Zener voltage of 9.1 V with ±5% tolerance, measured at a test current (IZT) of 41.2 mA and end-cap temperature (TEC) of 30 °C after 90 seconds of stabilization. This tolerance ensures predictable regulation behavior in production-grade power supplies and reference circuits where ±5% is sufficient for downstream LDO or op-amp biasing.
Does 1N5924BUR-1/TR support MIL-PRF-19500 screening?
Yes, 1N5924BUR-1/TR is available with MIL-PRF-19500 screening per the manufacturer's nomenclature options. Screening includes rigorous environmental testing, lot traceability, and process controls required for defense and aerospace applications. The "UR" suffix denotes the metallurgically bonded MELF variant qualified for this level of reliability assurance.
What is the maximum power dissipation for 1N5924BUR-1/TR at ambient temperature?
The 1N5924BUR-1/TR delivers 1.25 W steady-state power dissipation at TA = 25 °C when mounted on an FR4 PCB with 1 oz copper and the recommended footprint. At elevated ambient temperatures, power must be derated per Figure 1 in the datasheet, reaching zero dissipation at approximately 150 °C ambient due to its RθJA = 120 °C/W thermal resistance.
How does the DO-213AB MELF package improve reliability versus standard SMD packages?
The DO-213AB MELF package of the 1N5924BUR-1/TR uses hermetically sealed voidless glass and tungsten slugs to eliminate moisture-induced parameter drift and enhance thermal conduction. Its metallurgically bonded internal contacts reduce interfacial resistance, lowering thermal resistance (RθJEC = 40 °C/W) and improving long-term stability under thermal cycling-key advantages over plastic-tabbed SMD packages like SMB or SMAJ.
Is 1N5924BUR-1/TR RoHS compliant and what plating is used?
Yes, the "-TR" suffix indicates RoHS compliance; the 1N5924BUR-1/TR uses matte tin plating over copper, solderable per MIL-STD-750 Method 2026. This finish ensures compatibility with lead-free reflow profiles (up to 260 °C for 10 s) and eliminates tin whisker risk, making it suitable for high-reliability commercial and industrial assemblies.
1N5924BUR-1/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AB, MELF (Glass)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 9.1 V
- Tolerance:
- ±5%
- Power - Max:
- 1.25 W
- Impedance (Max) (Zzt):
- 4 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 7 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-213AB (MELF, LL41)
1N5924BUR-1/TR FAQ
1.How can I place an order for 1N5924BUR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5924BUR-1/TR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 1N5924BUR-1/TR reliable?
The price and inventory of 1N5924BUR-1/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5924BUR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N5924BUR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5924BUR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5924BUR-1/TR?
1N5924BUR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5924BUR-1/TR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 1N5924BUR-1/TR?
For technical support, including 1N5924BUR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5924BUR-1/TR requirements.
6.How does Aetrix verify that 1N5924BUR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N5924BUR-1/TR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 1N5924BUR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N5924BUR-1/TR?
All 1N5924BUR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5924BUR-1/TR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 1N5924BUR-1/TR part is unused and in its original packaging.
Return procedure for 1N5924BUR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5924BUR-1/TR Tags
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